Update Rust crate iddqd to 0.4 (#741)

Co-authored-by: oxide-renovate[bot] <146848827+oxide-renovate[bot]@users.noreply.github.com>

Author: oxide-renovate[bot]

Cargo.lock

@@ -139,7 +139,7 @@ serial_test = "3.3"
 internet-checksum = "0.2.1"
 network-interface = { git = "https://github.com/oxidecomputer/network-interface", branch = "illumos" }
 natord = "1.0"
-iddqd = "0.3"
+iddqd = "0.4"
 
 
 [workspace.dependencies.opte-ioctl]